470 lines
11 KiB
C
470 lines
11 KiB
C
/*-
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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/*
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static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93";
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*/
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* netstat
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <net/route.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/icmp_var.h>
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#include <netinet/ip_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcpip.h>
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#include <netinet/tcp_seq.h>
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#define TCPSTATES
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#include <netinet/tcp_fsm.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/tcp_debug.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include <nlist.h>
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#include <paths.h>
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#include "systat.h"
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#include "extern.h"
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static void enter __P((struct inpcb *, struct socket *, int, char *));
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static char *inetname __P((struct in_addr));
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static void inetprint __P((struct in_addr *, int, char *));
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#define streq(a,b) (strcmp(a,b)==0)
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#define YMAX(w) ((w)->_maxy-1)
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WINDOW *
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opennetstat()
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{
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sethostent(1);
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setnetent(1);
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return (subwin(stdscr, LINES-5-1, 0, 5, 0));
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}
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struct netinfo {
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struct netinfo *ni_forw, *ni_prev;
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short ni_line; /* line on screen */
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short ni_seen; /* 0 when not present in list */
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short ni_flags;
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#define NIF_LACHG 0x1 /* local address changed */
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#define NIF_FACHG 0x2 /* foreign address changed */
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short ni_state; /* tcp state */
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char *ni_proto; /* protocol */
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struct in_addr ni_laddr; /* local address */
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long ni_lport; /* local port */
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struct in_addr ni_faddr; /* foreign address */
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long ni_fport; /* foreign port */
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long ni_rcvcc; /* rcv buffer character count */
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long ni_sndcc; /* snd buffer character count */
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};
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static struct {
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struct netinfo *ni_forw, *ni_prev;
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} netcb;
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static int aflag = 0;
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static int nflag = 0;
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static int lastrow = 1;
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static void enter(), inetprint();
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static char *inetname();
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void
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closenetstat(w)
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WINDOW *w;
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{
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register struct netinfo *p;
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endhostent();
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endnetent();
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p = (struct netinfo *)netcb.ni_forw;
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while (p != (struct netinfo *)&netcb) {
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if (p->ni_line != -1)
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lastrow--;
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p->ni_line = -1;
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p = p->ni_forw;
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}
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if (w != NULL) {
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wclear(w);
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wrefresh(w);
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delwin(w);
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}
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}
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static struct nlist namelist[] = {
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#define X_TCB 0
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{ "_tcb" },
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#define X_UDB 1
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{ "_udb" },
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{ "" },
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};
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int
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initnetstat()
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{
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if (kvm_nlist(kd, namelist)) {
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nlisterr(namelist);
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return(0);
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}
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if (namelist[X_TCB].n_value == 0) {
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error("No symbols in namelist");
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return(0);
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}
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netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
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protos = TCP|UDP;
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return(1);
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}
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void
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fetchnetstat()
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{
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register struct inpcb *next;
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register struct netinfo *p;
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struct inpcbhead head;
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struct inpcb inpcb;
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struct socket sockb;
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struct tcpcb tcpcb;
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void *off;
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int istcp;
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if (namelist[X_TCB].n_value == 0)
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return;
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for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
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p->ni_seen = 0;
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if (protos&TCP) {
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off = NPTR(X_TCB);
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istcp = 1;
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}
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else if (protos&UDP) {
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off = NPTR(X_UDB);
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istcp = 0;
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}
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else {
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error("No protocols to display");
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return;
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}
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again:
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KREAD(off, &head, sizeof (struct inpcbhead));
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for (next = head.lh_first; next != NULL; next = inpcb.inp_list.le_next) {
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KREAD(next, &inpcb, sizeof (inpcb));
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if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
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continue;
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if (nhosts && !checkhost(&inpcb))
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continue;
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if (nports && !checkport(&inpcb))
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continue;
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KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
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if (istcp) {
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KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
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enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
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} else
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enter(&inpcb, &sockb, 0, "udp");
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}
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if (istcp && (protos&UDP)) {
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istcp = 0;
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off = NPTR(X_UDB);
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goto again;
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}
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}
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static void
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enter(inp, so, state, proto)
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register struct inpcb *inp;
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register struct socket *so;
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int state;
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char *proto;
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{
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register struct netinfo *p;
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/*
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* Only take exact matches, any sockets with
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* previously unbound addresses will be deleted
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* below in the display routine because they
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* will appear as ``not seen'' in the kernel
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* data structures.
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*/
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for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
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if (!streq(proto, p->ni_proto))
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continue;
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if (p->ni_lport != inp->inp_lport ||
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p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
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continue;
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if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
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p->ni_fport == inp->inp_fport)
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break;
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}
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if (p == (struct netinfo *)&netcb) {
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if ((p = malloc(sizeof(*p))) == NULL) {
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error("Out of memory");
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return;
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}
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p->ni_prev = (struct netinfo *)&netcb;
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p->ni_forw = netcb.ni_forw;
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netcb.ni_forw->ni_prev = p;
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netcb.ni_forw = p;
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p->ni_line = -1;
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p->ni_laddr = inp->inp_laddr;
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p->ni_lport = inp->inp_lport;
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p->ni_faddr = inp->inp_faddr;
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p->ni_fport = inp->inp_fport;
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p->ni_proto = proto;
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p->ni_flags = NIF_LACHG|NIF_FACHG;
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}
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p->ni_rcvcc = so->so_rcv.sb_cc;
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p->ni_sndcc = so->so_snd.sb_cc;
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p->ni_state = state;
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p->ni_seen = 1;
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}
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/* column locations */
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#define LADDR 0
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#define FADDR LADDR+23
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#define PROTO FADDR+23
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#define RCVCC PROTO+6
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#define SNDCC RCVCC+7
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#define STATE SNDCC+7
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void
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labelnetstat()
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{
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if (namelist[X_TCB].n_type == 0)
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return;
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wmove(wnd, 0, 0); wclrtobot(wnd);
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mvwaddstr(wnd, 0, LADDR, "Local Address");
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mvwaddstr(wnd, 0, FADDR, "Foreign Address");
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mvwaddstr(wnd, 0, PROTO, "Proto");
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mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
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mvwaddstr(wnd, 0, SNDCC, "Send-Q");
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mvwaddstr(wnd, 0, STATE, "(state)");
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}
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void
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shownetstat()
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{
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register struct netinfo *p, *q;
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/*
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* First, delete any connections that have gone
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* away and adjust the position of connections
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* below to reflect the deleted line.
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*/
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p = netcb.ni_forw;
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while (p != (struct netinfo *)&netcb) {
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if (p->ni_line == -1 || p->ni_seen) {
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p = p->ni_forw;
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continue;
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}
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wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
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q = netcb.ni_forw;
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for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
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if (q != p && q->ni_line > p->ni_line) {
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q->ni_line--;
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/* this shouldn't be necessary */
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q->ni_flags |= NIF_LACHG|NIF_FACHG;
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}
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lastrow--;
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q = p->ni_forw;
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p->ni_prev->ni_forw = p->ni_forw;
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p->ni_forw->ni_prev = p->ni_prev;
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free(p);
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p = q;
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}
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/*
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* Update existing connections and add new ones.
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*/
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for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
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if (p->ni_line == -1) {
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/*
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* Add a new entry if possible.
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*/
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if (lastrow > YMAX(wnd))
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continue;
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p->ni_line = lastrow++;
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p->ni_flags |= NIF_LACHG|NIF_FACHG;
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}
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if (p->ni_flags & NIF_LACHG) {
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wmove(wnd, p->ni_line, LADDR);
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inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
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p->ni_flags &= ~NIF_LACHG;
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}
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if (p->ni_flags & NIF_FACHG) {
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wmove(wnd, p->ni_line, FADDR);
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inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
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p->ni_flags &= ~NIF_FACHG;
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}
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mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
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mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
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mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
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if (streq(p->ni_proto, "tcp"))
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if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
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mvwprintw(wnd, p->ni_line, STATE, "%d",
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p->ni_state);
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else
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mvwaddstr(wnd, p->ni_line, STATE,
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tcpstates[p->ni_state]);
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wclrtoeol(wnd);
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}
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if (lastrow < YMAX(wnd)) {
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wmove(wnd, lastrow, 0); wclrtobot(wnd);
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wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
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}
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}
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/*
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* Pretty print an Internet address (net address + port).
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* If the nflag was specified, use numbers instead of names.
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*/
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static void
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inetprint(in, port, proto)
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register struct in_addr *in;
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int port;
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char *proto;
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{
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struct servent *sp = 0;
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char line[80], *cp, *index();
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snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
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cp = index(line, '\0');
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if (!nflag && port)
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sp = getservbyport(port, proto);
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if (sp || port == 0)
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snprintf(cp, sizeof(line) - (cp - line), "%.8s",
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sp ? sp->s_name : "*");
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else
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snprintf(cp, sizeof(line) - (cp - line), "%d",
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ntohs((u_short)port));
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/* pad to full column to clear any garbage */
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cp = index(line, '\0');
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while (cp - line < 22)
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*cp++ = ' ';
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line[22] = '\0';
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waddstr(wnd, line);
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}
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/*
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* Construct an Internet address representation.
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* If the nflag has been supplied, give
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* numeric value, otherwise try for symbolic name.
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*/
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static char *
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inetname(in)
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struct in_addr in;
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{
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char *cp = 0;
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static char line[50];
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struct hostent *hp;
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struct netent *np;
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if (!nflag && in.s_addr != INADDR_ANY) {
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int net = inet_netof(in);
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int lna = inet_lnaof(in);
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if (lna == INADDR_ANY) {
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np = getnetbyaddr(net, AF_INET);
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if (np)
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cp = np->n_name;
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}
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if (cp == 0) {
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hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
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if (hp)
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cp = hp->h_name;
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}
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}
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if (in.s_addr == INADDR_ANY)
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strcpy(line, "*");
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else if (cp)
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snprintf(line, sizeof(line), "%s", cp);
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else {
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in.s_addr = ntohl(in.s_addr);
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#define C(x) ((x) & 0xff)
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snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
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C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
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}
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return (line);
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}
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int
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cmdnetstat(cmd, args)
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char *cmd, *args;
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{
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register struct netinfo *p;
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if (prefix(cmd, "all")) {
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aflag = !aflag;
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goto fixup;
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}
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if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
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int new;
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new = prefix(cmd, "numbers");
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if (new == nflag)
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return (1);
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p = netcb.ni_forw;
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for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
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if (p->ni_line == -1)
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continue;
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p->ni_flags |= NIF_LACHG|NIF_FACHG;
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}
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nflag = new;
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goto redisplay;
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}
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if (!netcmd(cmd, args))
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return (0);
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fixup:
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fetchnetstat();
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redisplay:
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shownetstat();
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refresh();
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return (1);
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}
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